I don't believe the printer installation is at issue, because it worked previously with the XP m/c. I've rebooted the server it is attached to, just in case, but to no good effect. I've since sold the XP, so can't go back to that to help with fault finding.
I've upgraded the printer driver on Win7, and have proven that direct printing from the usb port on PC is fine. The print job appears in the print queue, but after a couple of minutes there is an error message "Error - Printing" Not very helpful.
The new PC has Norton security built in, but I don't believe the firewall is the issue. I've tried disabling for a period, and setting the server as a 'trusted' site - no effect. If there is any troubleshooting to prove/disprove this, that might be helpful.
I've heard mention of 'compatability mode' with Win7, is that relevant to a solution here?
There are some similar posts elsewhere, but none seem to quite fit what I'm doing. e.g.
Anyone with ideas or suggestions?